thinkorswim is the best trading software you can get without paying a platform fee, and for most active traders that settles it. The catch isn’t the software. It’s the retail brokerage underneath: limit-only extended hours, a 7:00 a.m. premarket start for most small caps, and short margin math that gets expensive fast on low-priced names.
Our rating: 4.4 / 5 (criteria and weights on how we rate)
Best for: active traders who want professional charting, scanning, and 24/5 access with zero platform cost.
NOT for: premarket gap traders and dedicated short sellers who need 4 a.m. execution and a locate desk.
Price: the platform suite (desktop, web, mobile) is free with any Schwab brokerage account. Trades cost $0 for listed stocks and ETFs, $0.65 per options contract, $2.25 per futures contract, $6.95 per OTC trade.
Pros
- Free platform suite, $0 stock commissions, free TotalView Level 2
- 24/5 trading on 1,100+ stocks and ETFs
Cons
- Premarket execution starts 7:00 a.m. for stocks outside the 24/5 list
- Extended-hours sessions accept limit orders only
What thinkorswim is and who runs it
thinkorswim is Charles Schwab’s trading platform suite: a desktop application, a web version, and a mobile app, all free to any Schwab brokerage client. Schwab acquired it with TD Ameritrade in 2020 and has kept it as the trading arm of the firm, branded “Schwab Trading Powered by Ameritrade.”
Three versions, one login. Desktop is the full build: scanning, thinkScript coding, the deepest customization. Web carries the essential desktop functions in a browser with no download. Mobile packs a surprising amount of the desktop into a phone, though screeners stay on desktop and web only, per Schwab’s own platform comparison. Stocks, ETFs, options, futures, and forex all trade on the suite; mutual funds and fixed income do not, which Schwab states plainly in its platform table. A Schwab Crypto account for Bitcoin and Ethereum is listed as coming soon at a 0.75% trade fee.
There’s no account minimum to open a Schwab brokerage account and no fee to use any thinkorswim platform. You fund by ACH, wire, or check.
The day trading rules just changed, and Schwab moved fast
If you last looked at thinkorswim a year ago, the single biggest thing about it has changed: the $25,000 day trading minimum is gone.
The SEC approved scrapping the pattern day trader framework on April 14, 2026. The old rules went off the books June 4, 2026, and brokers have until October 2027 to finish implementing the replacement. Schwab didn’t wait. Per Schwab’s own announcement, as of June 8, 2026 it no longer counts day trades, no longer flags accounts as pattern day traders, and has removed the PDT designation from accounts under $25,000. Those accounts now day trade with their available buying power, full stop.
What replaces the old regime is intraday margin. Schwab is rolling out Intraday Margin Buying Power for eligible margin accounts: a real-time figure based on your equity and open positions, applying to securities with a standard 25% intraday requirement. Under the new rules brokers could check margin once at the end of the day or monitor in real time; Schwab chose real time, which means it can block a trade that would create or increase an intraday margin deficit. That’s a meaningful detail. Real-time monitoring protects you from digging a hole, but it also means a fast-moving open position can shrink your buying power mid-session.
One transitional wrinkle: accounts that were above $25,000 with a PDT designation keep their old Day Trading Buying Power as long as equity stays above $25,000 at the start of each day. Drop below once and Schwab removes the designation permanently, switching the account to the new framework. For the mechanics of the replacement regime across brokers, see our guide to intraday margin requirements.
Charting and the Active Trader ladder
The desktop charting is the deepest in the retail broker class: 400+ technical studies, eight Fibonacci tools, up to 20 drawings per chart, plus chart types most platforms skip entirely, like Monkey Bars and Renko. If you can’t build your setup view here, the problem isn’t the toolbox.
For execution, the Active Trader tab pairs a chart with a price ladder showing bid size, ask size, and volume in real time. You click a row in the bid or ask column to place a limit order at that price; the default size is 100 shares, adjustable with presets. Schwab’s own materials walk through using the ladder to manage entries in thin conditions, which tells you something about who the feature is for. Point-and-click ladder trading is the closest thing thinkorswim has to the direct-access workflow, and it works.
thinkScript, the platform’s built-in coding language, lets you write custom studies, alerts, and strategy tests. There’s a condition wizard for non-coders, and the options backtesting and probability analysis tools live in the Analyze tab. None of this costs extra.
Scanning with Stock Hacker
Stock Hacker is the built-in scanner: filter the market on fundamental, technical, and options data, including custom thinkScript conditions. Add Trade Flash, a gadget streaming analyst moves, block trades, and trade imbalances, and you have a respectable opportunity-finding layer for a free platform.
Respectable is the honest word. Stock Hacker is a screener you query; it’s not a dedicated momentum engine firing premarket gapper and relative-volume alerts at you all morning. Plenty of traders run thinkorswim for charts and execution and pair it with a standalone scanner for idea flow; our Trade Ideas review covers the tool most commonly used in that role.
Order types and extended hours: read the fine print
Regular-session order support is wide: market, limit, stop-limit, conditional orders, complex multi-leg options tickets. Outside regular hours is where the rules tighten, and Schwab documents them precisely on its extended hours page:
| Session | Execution window (ET) | Orders accepted |
|---|---|---|
| Pre-market | 7:00–9:25 a.m. | Limit only |
| Regular | 9:30 a.m.–4:00 p.m. | All order types |
| After-hours | 4:05–8:00 p.m. | Limit only |
| EXT (13-hour continuous) | 7:00 a.m.–8:00 p.m. | Limit only |
| EXTO (24-hour, thinkorswim only) | Around the clock, 24/5-eligible symbols | Limit only |
Two things matter here for day traders. First, every extended session is limit-orders-only. That’s workable (most traders shouldn’t be using market orders premarket anyway, since a market order in a thin book is how you donate money), but it rules out stop orders for premarket risk management.
Second, the premarket session executes from 7:00 a.m. Webull, a direct retail peer, runs its premarket from 4:00 a.m. per its published trading-hours FAQ. The 24/5 session closes part of that gap, but only for the roughly 1,100 eligible large caps and ETFs. The low-float gapper that ran 40% on a 5 a.m. press release isn’t on that list, and on thinkorswim you can’t touch it until 7:00. If your strategy lives in the 4:00–7:00 window, that alone disqualifies the broker.
24/5 trading: the genuinely unusual feature
On thinkorswim platforms only, every stock in the S&P 500, Nasdaq 100, and Dow 30, plus over 600 ETFs, trades 24 hours a day, five days a week: 8 p.m. ET Sunday through 8 p.m. ET Friday, with five-minute pauses around the regular session. Orders use the EXTO time-in-force and are limit-only, and Schwab notes that during the overnight session Level 2 quotes aren’t shown and the last trade price isn’t displayed for EXTO orders.
For large-cap traders this is a real edge. Earnings drop at 4:30, geopolitics breaks at midnight, and you can act instead of watching futures and waiting. Liquidity overnight is thin and spreads widen, which Schwab says itself, so size accordingly. But the capability exists, it’s free, and most brokers don’t have it.
Market data: free TotalView Level 2
Level 2 on thinkorswim is Nasdaq TotalView, available on desktop, web, and mobile at no charge for non-professional accounts. Time and sales is built in. For a $0 platform, getting full-depth book data free is a quietly large line item: traders coming from paid platforms are used to data subscriptions stacking $50 or more onto the monthly bill before the first trade.
The one documented gap: Level 2 covers premarket and after-hours sessions but not the overnight session.
paperMoney and the 30-day Guest Pass
paperMoney is the built-in simulator: $100,000 in virtual buying power, real-time data, and most of the live platform’s tools, free for any client. The killer detail is the Guest Pass: 30 days of paperMoney access on any thinkorswim platform with no Schwab account at all, per the Guest Pass page. No funding, no transfer, no commitment. It can’t be extended, your settings don’t carry over if you open a real account later, and Schwab can’t recover lost Guest Pass credentials, so write them down.
That’s the most generous try-before-you-buy in the broker category, and it’s the right way to find out whether the learning curve below is worth your time. We compare broker simulators in our roundup of paper trading apps.
Pricing, fees, and margin
Commissions verified against schwab.com’s pricing page in June 2026:
| Item | Online cost |
|---|---|
| Listed stocks and ETFs | $0 |
| Options | $0 base + $0.65 per contract |
| Futures and futures options | $2.25 per contract |
| OTC equities | $6.95 per trade |
| Forex | $0 commission, cost in the spread |
| Broker-assisted trades | $25 service charge added |
| Platform, account opening, maintenance | $0 |
Two fees deserve a day trader’s attention. The $6.95 OTC charge means a round trip on a pink-sheet runner costs $13.90; take ten of those in a session and you’ve paid $139 for the privilege. And foreign stocks traded on US OTC markets carry a $50 transaction fee. If OTC names are your bread and butter, this fee schedule is built to discourage you.
Margin: you need $2,000 in cash or marginable securities to borrow, the standard floor. Schwab’s base rate is 10.00% (last changed December 12, 2025), and the smallest debit tier, under $25,000, runs an effective 11.825%. Day traders who go home flat barely feel margin interest, since it accrues on overnight debits. Swing the same account into multi-day holds and the rate starts to matter.
On billing there’s nothing to game and nothing to cancel: no subscription, no auto-renewal, no refund window to track, because nothing is charged for the software. Against a category where serious day trading platforms commonly run three-figure monthly fees, that’s the single strongest line in thinkorswim’s column.
Execution and order routing
Schwab publishes its numbers, which most brokers don’t do this visibly. Per its execution quality page, in Q1 2026 clients received $756 million in price improvement on exchange-listed equity orders, 97% of orders were price-improved, and average execution speed was 0.05 seconds, with the statistics independently analyzed by S3 Matching Technologies.
The structure behind those numbers is standard retail: Schwab’s SEC Rule 606 reports disclose that it receives payment for order flow from market makers for listed equity and options orders. That model produces the price improvement above, and on liquid names with tight spreads it serves most traders well. What it doesn’t offer is what direct-access brokers sell: your choice of route, fee-or-rebate ECN economics, and the fill control that traders moving size in fast tape pay commissions to get. Traders who hit that ceiling typically move to a direct-access setup; our DAS Trader review covers the platform that workflow is built on, and DAS Trader vs thinkorswim puts the two side by side.
Shorting on thinkorswim: the maintenance math
Short selling requires margin approval, and Schwab’s published margin requirements get strict exactly where momentum shorts hunt. Maintenance on a short above $16.66 is the normal 30% of market value. Between $5.00 and $16.66 it’s a flat $5 per share. From $2.50 to $4.99 it’s 100% of short market value, and below $2.50 it’s $2.50 per share.
Run the numbers on a typical small-cap fade: short 1,000 shares of a $6.50 stock and the position’s market value is $6,500, but the maintenance requirement is $5 × 1,000 = $5,000, not the $1,950 that 30% would suggest. That’s 77% of the position value locked up as maintenance. Long traders in cheap stocks face their own wall: anything under $3.00 per share is 100% requirement, meaning no margin at all.
These tables are published, consistent, and not unusual for a retail broker. What Schwab doesn’t publish is the other half of a short seller’s toolkit: there’s no advertised locate desk, hard-to-borrow inventory list, or per-share locate pricing the way short-focused direct-access brokers present them. If shorting low-float names is the core of your trading, you’re shopping in the wrong aisle here.
Learning curve and support
The platform’s own scope tells you what you’re signing up for: three platforms, 400+ studies, a scripting language, five extended-hours order timing codes, and an options analytics suite. Schwab clearly knows this, because the support apparatus around it is unusually heavy: a built-in Learning Center, Schwab Coaching webcasts, a video tutorial library, and a Trade Desk of trading specialists reachable by phone and chat 24/7, with chat support built into every platform.
Plan on real time investment before the platform feels fast. The honest path is the one Schwab itself provides: take the 30-day Guest Pass, build your layout in paperMoney, and only fund when the workflow is muscle memory. Most day traders lose money, and fumbling an unfamiliar order ticket with live size is a fully avoidable way to join them; the base rates are laid out in our day trading statistics.
Who should use thinkorswim, and who shouldn’t
Use it if you trade liquid listed stocks, ETFs, options, or futures during regular hours or on the 24/5 list, and you want professional-grade charting and analysis without a platform bill. It’s also the obvious choice if you already hold long-term accounts at Schwab and want trading and investing under one login. For options traders specifically, the analytics depth at $0.65 per contract is hard to argue with.
Skip it if you trade premarket gappers before 7 a.m., short low-priced small caps, or live on OTC names. Those three profiles run into documented walls: the 7:00 a.m. session start, the $5-per-share short maintenance band, and the $6.95 OTC commission. A direct-access broker is the right tool for all three.
If you’re between those poles, a common setup is to keep thinkorswim as the free charting and execution layer and add a dedicated scanner for idea generation; thinkorswim pairs well with a standalone alerting tool precisely because the broker side costs nothing.
Alternatives
TradeStation is the closest like-for-like: another broker with desktop-class software and a strong simulator. Our thinkorswim vs TradeStation comparison calls the matchup section by section. Webull is the budget-side alternative with a 4:00 a.m. premarket start, at the cost of far shallower analytics. And for traders who’ve outgrown retail execution entirely, the direct-access platforms covered across our broker rankings are the next step up in control and the first step up in cost.
Verdict
| Criterion | Weight | Score |
|---|---|---|
| Core capability (execution, routing and locates) | 40% | 4.0 |
| Value | 20% | 4.5 |
| Ease of use | 15% | 3.0 |
| Trust and transparency | 15% | 4.5 |
| Support and education | 10% | 4.5 |
| Overall | 4.4 |
Core capability scores on the broker’s job, not the software’s polish: execution statistics are published, audited, and fast (0.05-second average, 97% price-improved in Q1 2026), and 24/5 access is a genuine capability edge, but there’s no route selection, no locate infrastructure, and a 7:00 a.m. premarket start for everything off the 24/5 list. Value is near the top of the category because the entire professional toolkit, TotalView included, costs nothing. Ease of use carries the platform’s documented sprawl. Trust and transparency reflects published execution data with third-party analysis, public order-routing reports, and a fee schedule with no fine-print subscriptions. Support earns its score with 24/7 trading specialists and the deepest free education stack among the brokers we cover.
The next step depends on which trader you are. If the regular session is your battlefield, take the Guest Pass and judge the platform with your own layouts. If the premarket and the short side are where you make your money, read the DAS Trader vs thinkorswim comparison before you fund anything.
FAQ
Is thinkorswim free?
Yes. All three platforms (desktop, web, mobile) come free with a Schwab brokerage account, which itself has no minimum and no maintenance fee. You pay only Schwab’s standard trade pricing: $0 stocks and ETFs, $0.65 per options contract, $2.25 per futures contract.
Can you day trade on thinkorswim without $25,000?
Yes. The SEC eliminated the pattern day trader rule effective June 4, 2026, and as of June 8, 2026 Schwab no longer counts day trades or restricts accounts by day trade frequency. Margin accounts trade with their available buying power under Schwab’s new intraday margin framework, monitored in real time.
Does thinkorswim have a free trial?
The Guest Pass gives 30 days of access to paperMoney, the built-in simulator, on any thinkorswim platform with no Schwab account required. It includes $100,000 in virtual buying power and can’t be extended; after 30 days you’d open a regular account, which is free, to keep using the platform.
Is thinkorswim good for beginners?
The software is more platform than a beginner needs on day one, but the path in is gentler than it looks: paperMoney for risk-free practice, a built-in Learning Center, and 24/7 specialist support. Start in the simulator and treat the first weeks as platform training, not trading.
What are thinkorswim’s trading hours?
Regular session 9:30 a.m.–4:00 p.m. ET, premarket execution 7:00–9:25 a.m., after-hours 4:05–8:00 p.m., all limit-orders-only outside regular hours. Over 1,100 large-cap stocks and ETFs also trade 24 hours a day, five days a week, exclusively on thinkorswim platforms.
Is there a cost to stop using thinkorswim?
No. There’s no subscription to cancel and no platform fee accrues whether you trade or not. The software simply sits free inside the brokerage account.